J Korean Soc Echocardiogr.  1995 Dec;3(2):121-129. 10.4250/jkse.1995.3.2.121.

A Study on The Left Ventricular Diastolic Dysfunction in Ischemic Heart Disease: Influence of Left Ventricular Diastolic Dysfunction on Left Atrium

Affiliations
  • 1Division of Cardiology, Department of Intarnal Medicine, Chonnam University Medical School, Kwangju, Korea.

Abstract

BACKGROUND
Diastolic dysfunction of left ventricle appears to be one of the earliest detectable abnormalities in a number of disorders. The aims of this study is to evaluate the influence of left ventricular diastolic dysfunction on left atrial function in patients with ischemic heart diseases. METHOD: Echocardiography, coronary and left ventricular(LV) angiography and LV catheterization were performed in 43 patients with ischemic heart disease to assess the influence of left ventricular(LV) diastolic dysfunction on left atrial function. They were divided to two groups by the absolute increase in left ventricular pressure during left atrial contraction(A amplitude; Group I : ≥5mmHg, Group II : < 5mmHg).
RESULTS
There were no significant difference in severity of coronary arterial lesions and Doppler echocardiographic parameters between the two groups. In M-mode echocardiography, Left atrial dimensions were measured at presystole(A1), early diastole(A2), and before and after left atrial contraction (A3, A4). In Graoup I, A1 was 37.3±5.1mm, A2 was 33.8±5.2mm, A3 was 34.4±5.5mm, and A4 was 29.3±50mm. In Group II, A1, 37.0±4.1mm, A2, 33.2±4.9mm, A3, 34.1±4.3mm, and A4, 28.5±4.6mm. The fractional shortening of early and late diastolic phase of left atrium[F1 = (A1-A2)/A1×100), F2 = ((A3-A4)/A3×100)] by the formula were 9.4±5.1%, 14.9±6.7% each, in Group I. In Group II, 12.1±7.3%, 20.6±10.2% each. F2 was higher in Group II(p < 0.05). Left ventricular end diastolic pressure(LVEDP), LV pressure just before atrial contraction(Pre-A pressure) and absolute increase in left ventricular pressure during left atrial contraction(A amplitude) were more higher in group I(Group I : 18.4±7.9mmHg, 10.0±5.7mmHg, 10.3±4.4mmHg, Group II : 9.77±5.4mmHg, 6.5±4.1mmHg, 3.5±1.6mmHg, p < 0.0005, p < 0.05, p < 0.0001). There was a good negative correlation between A amplitude and F2(r=-0.42, p < 0.005).
CONCLUSION
In patients wiht ischemic heart disease, LVEDP was higher and left ventricular ejection fraction and late diastolic fractional shortening of left atrium were lower in group with higher A amplitude. Thus, left atrial systolic function was reduced in proportion to left ventricular stiffness.

Keyword

Ischemic Heart disease; Left ventricular stiffness; Left atrial systolic function

MeSH Terms

Angiography
Atrial Function, Left
Catheterization
Catheters
Echocardiography
Heart Atria*
Heart Ventricles
Humans
Methods
Myocardial Ischemia*
Stroke Volume
Ventricular Pressure

Figure

  • Fig. 1. The left ventricular pressure recording illustrating pressure measurements in this study. These included left ventricular pressure just before atrial contraction(pre-A), left ventricular end diastolic pressure(LVEDP) and the absolute pressure increase in left ventricle that occurred as a result of left atrial contraction(A amp.).

  • Fig. 2. Measurements of the left atrial dimensions in M-mode echocardiography, left atrial dimensions were measured at presystole(A1), early diastole(A2), and before and after left atrial contraction(A3, A4). a: interval between R wave and closure of aortic valve.

  • Fig. 3. The Doppler echocardiographic recording of transmitral flow illustrating several of the Doppler variables measured in this study. E: peak velocity of early mitral flow, A: peak velocity of late mitral flow, IVRT: isovolumic relaxation time, A dur.: duration of late mitral flow. DT: deceleration time of mitral flow b: interval between R wave and onset of E wave.

  • Fig. 4. The correlation between the absolute increase in left ventricular pressure during atrial contraction(A amplitude) and the fractional shortening of late diastolic phase of left atrium(F2). This figure shows a good negative correlation between them.


Reference

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